It is always cool to repeat classic experiments. How many of us know the radius of the Earth because we determined it on our own? I haven't done this, at least not yet. For all my life I have just ...

This artist's impression of the Nu2 Lupi planetary system shows three exoplanets. These planets, discovered by the ESA's CHEOPS mission, range from approximately the size of Earth to about 2.5 times ...

The third planet from the sun is the densest in the solar system. It is the 5th largest planet, in the solar system, and has a radius of 6,378 km at the equator. Light can circle our planet about ...

Simulations predict that hot super-Earth sized exoplanets can have their envelopes stripped by photoevaporation, which would present itself as a lack of these exoplanets. However, this absence in the ...